Alright! Here are the two pics as requested of my MD2 after being in/out of the Mod-U-Lok holster for a few months.
It's in perfect conditions, no signs of wear on the anodization or the knurling.
The little white spots on the head were not caused by the holster. The other little white spots are mostly dirt that I noticed after taking the pictures.
This is how it sits in the holster :
EDIT : added an image.